ZnCl2/AC catalysts are prepared through a wet impregnation method,and used in the hydrochlorination of ethylene glycol,aiming for efficient and safe synthesis of 2-chloroethanol and addressing the current surplus of ethylene glycol.The catalysts prepared are fully characterized by means of XRD,FT-IR,Py-IR and N2 isothermal adsorption-desorption.The influences of ZnCl2 loading amount on the physical and chemical properties and catalytic activity of activated carbon(AC)are investigated.Results show that the loading of ZnCl2 significantly increases the number of Lewis acid sites on AC,therefore enhances the catalytic activity significantly.At a temperature of 220℃,LHSV of 1 h-1,and n(HCl)/n(EG)ratio of 2∶1,the 10％ZnCl2/AC catalyst exhibits the best catalytic performance with an ethylene glycol conversion rate of 88.26％and a 2-chloroethanol selectivity of 93.57％.
2-chloroethanolethylene glycolhydrochlorinationZn-based catalystfixed bed reactor
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